66 lines
1.6 KiB
JavaScript
66 lines
1.6 KiB
JavaScript
// Copyright IBM Corp. 2013,2019. All Rights Reserved.
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// Node module: loopback-datasource-juggler
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// This file is licensed under the MIT License.
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// License text available at https://opensource.org/licenses/MIT
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'use strict';
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module.exports = function getIntrospector(ModelBuilder) {
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function introspectType(value) {
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// Unknown type, using Any
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if (value === null || value === undefined) {
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return ModelBuilder.Any;
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}
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// Check registered schemaTypes
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for (const t in ModelBuilder.schemaTypes) {
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const st = ModelBuilder.schemaTypes[t];
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if (st !== Object && st !== Array && (value instanceof st)) {
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return t;
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}
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}
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const type = typeof value;
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if (type === 'string' || type === 'number' || type === 'boolean') {
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return type;
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}
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if (value instanceof Date) {
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return 'date';
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}
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let itemType;
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if (Array.isArray(value)) {
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for (let i = 0; i < value.length; i++) {
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if (value[i] === null || value[i] === undefined) {
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continue;
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}
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itemType = introspectType(value[i]);
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if (itemType) {
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return [itemType];
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}
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}
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return 'array';
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}
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if (type === 'function') {
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return value.constructor.name;
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}
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const properties = {};
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for (const p in value) {
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itemType = introspectType(value[p]);
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if (itemType) {
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properties[p] = itemType;
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}
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}
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if (Object.keys(properties).length === 0) {
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return 'object';
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}
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return properties;
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}
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ModelBuilder.introspect = introspectType;
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return introspectType;
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};
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